Job commitment is the degree to which an employee identifies with the organization and wants to continue actively participating in it. Commitment is one of the important consequences of employee welfare maintenance. The study investigated employee welfare and job commitment in tertiary institutions in Bayelsa State, Nigeria. The study was guided by 3 research questions with their corresponding null hypotheses. The methodology of the study is correlational research design. The population for the study was 1,730 senior non-academic staff of tertiary institutions in Bayelsa State. A total of 325 respondents were selected from senior non-academic staff of tertiary institutions in Bayelsa State. Data was collected through a means of researcher-designed questionnaire. The instrument also went through reliability testing which showed that the instrument was reliable enough for the study. Kendall’s tau-b Correlation Coefficient was used to analyze the data that was generated. Welfare was found to have a strong relationship with the dependent variables namely job commitment. The analysis shows that welfare is positively and significantly related to affective, normative, and continuance commitment among senior non-academic staff of tertiary institutions in Bayelsa State. It was concluded that good and positive employee welfare of an institution is an outcome of many things: such as appropriate employee welfare packages, employees’ satisfaction, long-term strategic moves of institutions, effective policies, and so on. Based on the findings it was recommended among others that there should be some empirical measures on how to promote employee welfare internally and externally; maybe through workers’ welfare packages and sponsorship.